GEN Protocols

The dynamic new hub for editorially curated, freely accessible scientific protocols, and technical tips & tricks in biotechnology



Lentiviral titering by crystal violet staining

This protocol provides an example for titering lentiviral particles using crystal violet staining in a 6-well format to obtain transducing units per mL (TU/mL). Once lentiviral particles are packaged and collected, small aliquots should be frozen at –80°C. One aliquot should be thawed on ice and use... More


Multiplexed, trackable CRISPR-based genome engineering for optimization of heterologous protein expression and activity in E. coli

This work demonstrates the use of the Onyx platform for interrogation and optimization of heterologous proteins in E. coli. Compared to traditional methods for protein engineering, such as random mutagenesis or targeted site-directed mutagenesis approaches, the Onyx technology dramatically increases... More


Rebuilding evolutionary success: Using Inscripta’s Onyx Digital Genome Engineering Platform to ease and enhance Adaptive Laboratory Evolution experiments

Adaptive Laboratory Evolution (ALE) is a powerful approach to leverage biology’s evolutionary capacity to develop strains that thrive in challenging growth environments, with applications to biotechnology and bioproduction and for basic biochemical discovery. ALE experiments have been enabled by nex... More


IsoCode Single-Cell Adaptive Immune: TCR-T Protocol

A. Overview of ProtocolDay 1: Cryopreserved TCR-T cells are thawed and cultured overnight in the presence of IL-2. Cryopreserved target cell lines are thawed, cultured and passaged several days prior to beginning the experiment.Day 2: Enrichment, Staining, and Antigen Stimulation of CD4+ and/or CD8+... More


Investigating the increased lifespan in C. elegans daf-2 mutants by 4D-Lipidomics™

The small nematode Caenorhabditis elegans is one of the premier biomedical model organisms and employed in many aspects of basic and applied science.... More

Annual Guide